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Finding the Fourth Proportional to 12,711.15, 19,066.98 and 8,947.54

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Solution

The fourth proportional to 12,711.15, 19,066.98 and 8,947.54 is: 13,421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.15 : 19,066.98 = 8,947.54 : x
  2. Step 2: Convert to fraction form
    12,711.15/19,066.98 = 8,947.54/x
  3. Step 3: Cross multiply
    12,711.15x = 19,066.98 × 8,947.54
  4. Step 4: Simplify right side
    12,711.15x = 170,602,518.56
  5. Step 5: Solve for x
    x = 170,602,518.56/12,711.15
  6. Step 6: Final answer
    x = 13,421.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.